Air release valve



FIG. 1 is a perspective view of an air release valve;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof; and,

FIG. 7 is a back elevation view thereof.

With reference FIGS. 4 and 5, broken line areas show environmental subject matter and form no part of the claimed design.

The intended use of the design is a valve for insertion and removal of air from water lines and liquids. 

CLAIM The ornamental design for an air release valve, as shown and described. 